Heavy-duty rail



FIG. 1 is a perspective view of the invention showing the new design;

FIG. 2 shows a right side elevational view of the invention shown in FIG. 1;

FIG. 3 shows a left side elevational view of the invention shown in FIG. 1;

FIG. 4 shows a front elevational view of the invention shown in FIG. 1;

FIG. 5 shows a rear elevational view of the Invention shown in FIG. 1;

FIG. 6 shows a top view of the Invention shown in FIG. 1; and,

FIG. 7 shows a bottom view of the Invention shown in FIG. 1.

The broken lines showing environment in the drawing are for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for the heavy-duty rail, as shown and described. 